Infineon IFX90121 2.2MHz Step-Down Regulator is a high frequency PWM step-down DC/DC converter with a wide input voltage range from 4.75V to 45V that makes the IFX90121 suitable for a wide variety of applications. The switching frequency of 2.2MHz allows the use of small inductors and capacitors, resulting in minimized board space. Pulse Frequency Modulation is used to optimize efficiency in light load conditions. The low quiescent current in shutdown (less than 45μA at nominal input voltage) makes the device suitable for battery powered systems. Additional applications include smart metering and general purpose industrial.
Features
500mA step down voltage regulator
5V Output voltage
±2% output voltage tolerance
Low quiescent current (less than 45μA at nominal input voltage)
Integrated power transistor
Current mode PWM regulation
PFM mode for light load current
Input voltage range from 4.75V to 45V
2.2MHz switching frequency
100% Duty cycle
Synchronization input
Very low shutdown current consumption (<2μA)
Soft-start function
Input under voltage lockout
Suited for industrial applications: Tj = -40°C to +125°C
